<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>瀑布流效果</title>
  </head>
  <body>
    <!-- 瀑布流四列布局 -->
    <div class="wrap">
      <div class="col"></div>
      <div class="col"></div>
      <div class="col"></div>
      <div class="col"></div>
    </div>
    <div id="bottom"></div>
  </body>
</html>
